NihontoWatchNihontoWatchA Owari iron sukashi tsuba attributed to Sadahiro (貞広) and accompanied by NTHK Hozon certification. Executed in maru-gata, the design is exceptionally restrained, consisting of a broad outer rim, two large symmetrical open spaces and a strong central seppa-dai enclosing the nakago-ana. The simple composition places particular emphasis on the quality of the iron, the proportions and the carefully controlled negative space. The tsuba displays the characteristic austere and functional elegance of the Owari school. Its dark brown-black patina and visibly forged surface retain a natural, aged appearance, while the subtly irregular contours of the openwork give the piece considerable individuality. The comparatively thin construction, combined with the elongated central seppa-dai, produces a balanced and understated silhouette typical of refined Owari iron work.
NihontoWatchOffered by Nihonto Art
2 on the market
Iron-tsuba · Owari
2 pieces on the market now
Where Sadahiro stands among comparable artisans: across all of nihontō, and within tradition, era, and period. The tiers (Foremost · Leading · Major · Notable) weigh official designations from the NBTHK and Japan's Agency for Cultural Affairs, together with historical honors of lasting repute such as the Sansaku and Meibutsu-chō.
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Iron-tsuba · Owari
71 pieces on the market now
The Owari school represents one of the twin pillars of Japanese iron openwork tsuba production, standing alongside the Kyō tradition as a defining force in the art of ji-sukashi (ground openwork) guards. The school's origins lie in the Owari province (modern Aichi prefecture), where production began in the early to middle Muromachi period and continued across a sustained span extending into the Edo period. While Kyō sukashi is characterized by delicacy and graceful elegance, Owari guards distinguish themselves through a tasteful refinement that conceals inner strength—a quality often described as possessing both dignity and rustic vigor. The tradition's most celebrated artisan, Yamakichibee, worked alongside contemporaries such as Hoan to establish technical standards that would define the school's reputation. Early signatures appear in forms such as "Yamasaka Kichibee" and abbreviated variants "Yama Kichibee," with the character へ understood as a shortening of 衛, suggesting generational succession across the late Muromachi and Momoyama periods. The technical achievements of Owari tsuba center on the mastery of iron itself, expressed through distinctive forging methods and surface treatment. The school's craftsmen employed a characteristic modeling technique called nikuoki, in which the central area of the plate is made slightly lower while the outer rim is raised, creating subtle variations in relief that enhance both visual depth and structural integrity.
This treatment is complemented by the dramatic appearance of tekkotsu (iron bones)—crystalline grain structures that emerge along the kaku-mimi ko-niku rim (angular rim with slight rounding) through controlled annealing or yakite finishing. These iron bones manifest in multiple forms: granular, clumped, linear, and pronounced masame (straight-grain) patterns, often appearing in lively activity across both the rim and the plate surface. The forged iron develops a deep, thick purple rust patina (murasaki-sabi) of exceptional beauty, while the plate itself may be finished with tsuchime (hammer texturing) or gently dished surfaces that create a melting, softened effect. The school's openwork compositions range from geometric patterned designs—such as flower petals, kozane (lamellar scales), and net patterns (amime-sukashi)—to boldly pictorial narratives incorporating the seppa-dai into unified compositions depicting catfish (namazu), crabs, wild geese (karigane), and literary themes such as the "Mount Utsu" scene from the Ise monogatari. The Owari tradition's influence extended well beyond the technical sphere, establishing aesthetic standards that defined connoisseurship and collecting practices for centuries. The school's guards were prized for what setsumei authors describe as an "antique, tasteful character" (koga no ajiwai)—a quality combining power, compact control, and the subtle fascination of fine iron that set them apart from contemporaneous work. While the school's original strengths began to diminish from the beginning of the Edo period, mature-phase examples from the late Muromachi and Momoyama periods demonstrate the full range of Owari excellence: stately presence achieved through imposing forms and thick construction, dynamic spatial effects created through kage-sukashi (shadow-like silhouette piercing), and an audacious, unconventional character that attracted eccentric taste (sukisha). Learn more →
| Smith | Era | Designated |
|---|---|---|
| Nobuie信家 | — | 56 |
| Hiko’emon彦右衛門 | — | 0 |
| Katsuaki克明 | — | 0 |
| Shigemasa重正 | — | 0 |
| Norisuke則亮 (Norisuke/Koreyoshi | — | 0 |
The NTHK’s principal certificate, issued for a fitting of considerable quality. It confirms a genuine signature, or, for an unsigned (mumei) work, records the judges’ attribution to a maker or school.
The NTHK (Nihon Tōken Hozon Kai, the Society for the Preservation of the Japanese Sword) is the oldest of Japan’s sword-appraisal bodies, founded in 1910, decades before the NBTHK. After the death of its long-serving head it divided into two successor societies, the NTHK and the NTHK-NPO, both of which continue to hold shinsa. NTHK blade certificates are known for a detailed worksheet that records a numerical point score alongside the judges’ written opinion (fitting papers carry the judges’ opinion without a point score), and the society is especially respected for its attribution of unsigned (mumei) work.
14-day return window in original/unused condition; antique items (swords, menuki, tsuba and similar) are expressly excluded from exchange; EU consumers retain a 14-day cancellation right; refunds within 10 business days of approval.